diff --git a/spec/factories/group_order.rb b/spec/factories/group_order.rb
new file mode 100644
index 00000000..ed6b6017
--- /dev/null
+++ b/spec/factories/group_order.rb
@@ -0,0 +1,9 @@
+require 'factory_girl'
+
+FactoryGirl.define do
+
+  # requires order and ordergroup
+  factory :group_order do
+  end
+
+end
diff --git a/spec/models/group_order_spec.rb b/spec/models/group_order_spec.rb
new file mode 100644
index 00000000..5c2138dd
--- /dev/null
+++ b/spec/models/group_order_spec.rb
@@ -0,0 +1,24 @@
+require 'spec_helper'
+
+describe GroupOrder do
+  let(:user) { FactoryGirl.create :user, groups: [FactoryGirl.create(:ordergroup)] }
+  let(:supplier) { FactoryGirl.create :supplier, article_count: true }
+  let(:order) { FactoryGirl.create(:order, supplier: supplier, article_ids: supplier.articles.map(&:id)).reload }
+
+  it 'needs an order' do
+    FactoryGirl.build(:group_order, ordergroup: user.ordergroup).should_not be_valid
+  end
+
+  it 'needs an ordergroup' do
+    FactoryGirl.build(:group_order, order: order).should_not be_valid
+  end
+
+  describe do
+    let(:go) { FactoryGirl.create :group_order, order: order, ordergroup: user.ordergroup }
+
+    it 'has zero price initially' do
+      go.price.should == 0
+    end
+  end
+
+end